Show lead Is found so SG deep that man cannot mine aline it durham england lead deposits go deeper than man can mine them according to findings recently published by dr arthur holmes noted british geologist in economic geology formerly it was believed that lead veins were closely related to the rocks containing them but dr holmes finds the lead in many rocks differs from lead in veins and Is actually a different kind of 0 lead having a different atomic weight basing his conclusions on the studies of radioactivity which he has been making for many years dr holmes has learned that rock lead not in veins contains the products of radioactive disintegration whilo while vein lead the material mined and sold does not contain radioactive end products it therefore appears according to holmes that vein lead does not have its source in the rocks surrounding the veins but in some deeper zone |